489643 has 8 divisors (see below), whose sum is σ = 610560. Its totient is φ = 381480.

The previous prime is 489631. The next prime is 489653. The reversal of 489643 is 346984.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 489643 - 2¹⁷ = 358571 is a prime.

It is a Duffinian number.

489643 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 489599 and 489608.

It is not an unprimeable number, because it can be changed into a prime (489613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3103 + ... + 3256.

It is an arithmetic number, because the mean of its divisors is an integer number (76320).

2⁴⁸⁹⁶⁴³ is an apocalyptic number.

489643 is a deficient number, since it is larger than the sum of its proper divisors (120917).

489643 is a wasteful number, since it uses less digits than its factorization.

489643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6377.

The product of its digits is 20736, while the sum is 34.

The square root of 489643 is about 699.7449535366. The cubic root of 489643 is about 78.8182007654.

The spelling of 489643 in words is "four hundred eighty-nine thousand, six hundred forty-three".